JP6431392B2 - Hydraulic shock absorber - Google Patents

Description

  The present invention relates to a shock absorber for a vehicle.

  Conventionally, in order to set the initial load of the hydraulic shock absorber according to the road surface condition, the rider's weight, etc., a double nut type that rotates the spring adjuster and the adjustment nut screwed on the outer periphery of the hydraulic shock absorber cylinder in the circumferential direction Is known (Patent Document 1).

  In such a hydraulic shock absorber, the spring is rotated by the vibration input from the traveling vehicle body and the spring adjuster is rotated so that the initially set initial load fluctuates. Therefore, an adjustment for fixing the spring adjuster is performed. A nut is required. For this reason, a special tool for tightening the adjustment nut is required, and the adjustment thereof is very complicated.

Japanese Patent Laid-Open No. 10-238582

  The present invention has been made in view of the above problems, and an object thereof is to provide a hydraulic shock absorber capable of setting an initial load of the hydraulic shock absorber with a simple configuration.

In the first invention for solving the above-mentioned problem, a cylinder extended in the axial direction, a piston slidably fitted in the cylinder, one end connected to the piston and the other end connected to the piston A piston rod extending to the outside of the cylinder; a spring provided so as to surround the cylinder and the piston rod; a spring receiving portion provided at the other end of the piston rod and supporting the other end of the spring; , with mounted on one end of the spring, extending from the end portion of the vehicle body side to an end portion of the axle side, it is opposed to the pair in the radial direction and a collision detecting portion that protrudes radially inward of the cylinder and spring guide, cut out in the axial direction from the end portion of the vehicle body at its outer periphery to the end of the axle side, is opposed to a pair radially, the outer periphery of the non-groove portion and a groove portion for篏合with the protrusion Axially A cylinder guide is attached to the outer periphery of the cylinder and having an eclipse was threaded portion, and has a screw portion on the inner periphery thereof, a plurality of recesses along the periphery, in contact with the one end of the spring guide A spring adjusting portion that adjusts the overall length of the spring with the spring receiving portion, and by fitting the protruding portion of the spring guide and the groove portion of the cylinder guide, the spring guide is The spring adjustment part is movable in the axial direction by being attached to the cylinder via the cylinder guide and screwing the screw part of the cylinder guide and the screw part of the spring adjustment part. It is characterized by.

In the second invention for solving the above-mentioned problem, a cylinder extended in the axial direction, a piston slidably fitted in the cylinder, one end connected to the piston and the other end connected to the piston A piston rod extending to the outside of the cylinder, a spring provided so as to surround the cylinder and the piston rod, a spring receiving portion provided on an outer periphery in the vicinity of one end of the cylinder and supporting one end of the spring; And at least one protrusion which is attached to the other end side of the spring, extends from the end portion on the vehicle body side to the end portion on the axle side, is opposed to the pair in the radial direction, and protrudes radially inward of the cylinder a spring guide having a section, cut out in the axial direction of the cylinder from an end portion of the vehicle body at its outer periphery to the end of the axle side, is opposed to a pair radially, the projection and篏合That a cylinder guide is attached to the outer periphery of the cylinder and having a threaded portion provided in the axial direction to the outer periphery of the non-groove portion and groove portion, and has a screw portion on the inner periphery thereof, a plurality along the outer periphery has a recess, by being in contact with the other end of the spring guide and a spring adjuster for adjusting the length of said spring between said spring receiving portion, and the projecting portion of the spring guide of the cylinder guide By fitting the groove portion, the spring guide is attached to the piston rod side via the cylinder guide, and the screw portion of the cylinder guide and the screw portion of the spring adjustment portion are screwed together. Thus, the spring adjusting portion is movable in the axial direction.

  The third invention of the present application is characterized in that, in the first or second invention, the groove portion of the cylinder guide is cut out in an axial direction from an end portion on a vehicle body side to an end portion on an axle side. To do.

  According to a fourth invention of the present application, in the first or second invention, the groove portion of the cylinder guide is cut out by a predetermined length in an axial direction from an end portion on the vehicle body side. .

  The fifth invention of the present application is characterized in that, in the first or second invention, the groove portion of the cylinder guide is cut out at a predetermined length in an axial direction from an end portion on an axle side. .

  In the sixth invention of the present application, in the first or second invention, the groove portion of the cylinder guide is cut at a predetermined length between an end on the axle side and an end on the vehicle body side on the outer periphery. It is characterized by lacking.

  According to a seventh invention of the present application, in any one of the first to sixth inventions, the spring guide is formed of a material that is deformable in a radial direction of the cylinder.

  The eighth invention of the present application is characterized in that, in any one of the first to seventh inventions, the spring adjustment portion includes a communication path in which an inner periphery and an outer periphery communicate with each other. To do.

  Further, in the ninth invention of the present application, in any one of the first to eighth inventions, the spring adjusting portion has an operation portion that can be operated by hand on the outer periphery thereof. .

  According to a tenth aspect of the present invention, in any one of the first to ninth aspects, a dust cover is provided on the outer periphery of the spring.

  According to the first and second inventions of the present application, the spring guide has a protruding portion protruding in the radial direction perpendicular to the axial direction of the cylinder, and the cylinder guide is notched in the axial direction of the cylinder on the outer periphery thereof. A groove portion. By fitting the protrusion and the groove, the spring guide is attached to the cylinder via the cylinder guide. Thereby, although the spring guide does not rotate in the circumferential direction, it can move in the axial direction. For this reason, rotation of the spring guide due to rotation of the spring can be prevented, and the spring only expands and contracts in the axial direction by movement of the spring guide in the axial direction. Therefore, in the present invention, it is not necessary to provide an adjusting nut for preventing the spring guide from rotating in accordance with the rotation of the spring, and thus a special tool is not required. Also, since the screw part on the inner peripheral side of the spring adjustment part and the screw part on the outer periphery of the cylinder guide are screwed together, the spring adjustment part can be moved in the axial direction simply by rotating the spring adjustment part in the circumferential direction. Thus, the total length of the spring interposed between the spring adjusting portion and the spring receiving portion can be easily changed, and the reaction force of the spring can be changed. That is, by rotating the spring adjustment portion, the spring total force can be changed via the spring guide to adjust the spring reaction force, and the initial set load of the spring can be easily adjusted.

  Further, according to the third invention of the present application, the groove portion of the cylinder guide is notched from the end portion on the vehicle body side to the end portion on the axle side on the outer periphery of the cylinder guide, so that the groove portion of the cylinder guide is fitted. The protruding portion of the spring guide can move in the axial direction from the end of the cylinder guide on the vehicle body side to the end on the axle side, and the spring guide can be attached to the cylinder guide from either the vehicle body side or the axle side.

  Further, according to the fourth invention of the present application, the groove portion of the cylinder guide is cut out at a predetermined length in the axial direction from the end portion on the vehicle body side, so that the spring guide protrudes from the end portion on the vehicle body side of the cylinder guide. The cylinder guide and the spring guide can be attached by fitting the portion and the groove portion of the cylinder guide. For example, when the groove portion of the cylinder guide has a predetermined length that does not reach the end portion on the axle side in the axial direction from the end portion on the vehicle body side of the cylinder guide, the movement toward the axle side causes the spring guide to move to the predetermined length. After moving, it can be stopped. For this reason, the spring adjustment part can also stop the movement to the axle side with a predetermined length like the spring guide. As a result, it is possible to prevent the spring adjustment portion from dropping off to the axle side.

  Further, according to the fifth aspect of the present invention, the groove portion of the cylinder guide is cut out at a predetermined length in the axial direction from the end portion on the axle side, so that the spring guide protrudes from the end portion on the axle side of the cylinder guide. The cylinder guide and the spring guide can be attached by fitting the portion and the groove portion of the cylinder guide. Further, for example, when the groove portion of the cylinder guide has a predetermined length that does not reach the end portion on the vehicle body side in the axial direction from the end portion on the axle side of the cylinder guide, the movement toward the vehicle body side causes the spring guide to move to a predetermined length. After moving the length, it can be stopped. For this reason, similarly to the spring guide, the spring adjusting portion can be restrained from moving to the vehicle body side by a predetermined length. As a result, it is possible to prevent the spring adjustment portion from falling off to the vehicle body side.

  Further, according to the sixth invention of the present application, the groove portion of the cylinder guide is cut out at a predetermined length between the end portion on the axle side and the end portion on the vehicle body side on the outer periphery thereof, so In addition, the spring guide can also be stopped after moving the spring guide for a predetermined length on the axle side. For this reason, the spring adjustment part can also stop the movement to the vehicle body side and the axle side with a predetermined length, like the spring guide. As a result, it is possible to prevent the spring adjustment portion from falling off to the vehicle body side and the axle side.

  According to the seventh invention of the present application, since the spring guide is formed of a material that can be deformed in the radial direction of the cylinder, for example, when a horizontal force is applied to the spring guide in a sectional view, the vertical diameter of the spring guide is increased. Since it spreads, the diameter of the part with the protrusion part of the spring guide can be deformed larger than the diameter of the part with the groove part of the cylinder guide. Thereby, for example, even when the groove is provided between the end of the cylinder guide on the vehicle body side and the end of the axle side in the axial direction, the end of the spring guide 50, 150 on the vehicle body side or the axle side Even if one of the end portions is not open, by aligning the positions of the spring guide protrusion and the cylinder guide groove to release the horizontal force, the spring guide protrusion The spring guide can be attached to the cylinder guide by fitting the groove portion of the cylinder guide.

  Further, according to the eighth invention of the present application, since the spring adjustment portion includes a communication path in which the inner periphery and the outer periphery communicate with each other, rainwater entering from a gap between the spring adjustment portion and the outer periphery of the cylinder is communicated. Easily drain to the outside. Of course, not only rainwater, but also dust and dirt entering the gap can be easily discharged to the outside along with rainwater from the communication path.

  Further, according to the ninth invention of the present application, the spring adjustment unit is easy to hold in the hand due to the presence of the operation unit, and can be rotated by holding the operation unit of the spring adjustment unit by hand. It becomes easier to adjust.

  According to the tenth aspect of the present invention, since the dust cover is provided on the outer periphery of the spring, dust and dirt do not adhere to the piston rod, the spring, etc., and the functions of the piston rod, the spring, etc. can be maintained.

1 is a front view of a hydraulic shock absorber according to Embodiment 1. FIG. 3 is a perspective view of a damper according to Embodiment 1. FIG. FIG. 3 is an exploded perspective view of the exterior component according to the first embodiment. It is a longitudinal cross-sectional view of the hydraulic shock absorber of S section shown in FIG. FIG. 3 is a diagram illustrating a manufacturing procedure of the hydraulic shock absorber according to the first embodiment. 6 is a front view of a hydraulic shock absorber according to Embodiment 2. FIG. FIG. 5 is a diagram illustrating a manufacturing procedure of a hydraulic shock absorber according to a second embodiment. (A) is a front view at the time of attaching a dust cover to the hydraulic shock absorber according to Embodiment 1, and (b) is a front view at the time of attaching a dust cover to the hydraulic shock absorber according to Embodiment 2. is there.

(Embodiment 1)

  FIG. 1 is a front view of a hydraulic shock absorber 1 according to the first embodiment. FIG. 2 is a perspective view of the damper D1 according to the first embodiment. FIG. 3 is an exploded perspective view of the exterior component G1 according to the first embodiment. FIG. 4 is a longitudinal sectional view of the hydraulic shock absorber 1 in the S section shown in FIG.

  The present invention will be described in detail through embodiments of the invention with reference to FIGS. 1 to 4, but the following embodiments do not limit the invention according to the claims, and are described in the embodiments. Not all of the combinations are essential for the solution of the invention. In the following description, the vertical direction for the user when facing the hydraulic shock absorber will be described as the vehicle body side and the axle side, respectively.

  As shown in FIG. 1, the hydraulic shock absorber 1 includes a damper D1 including a cylinder 10, an enlarged diameter portion 11, a piston rod 20, a vehicle body side mounting member 24, and an axle side mounting member 21, a spring receiving portion 22, a spring 2, and a protector. 13, a spring guide 50, a cylinder guide 40, a spring adjustment unit 30, and an exterior part G <b> 1 including a cap 37.

  In the hydraulic shock absorber 1, a damper D1 and a spring 2 that is inserted so as to surround the cylinder 10 in the damper D1 are integrated to form a cushion unit. The cushion unit includes a vehicle body (not shown) and an axle (not shown). (Not shown). The spring 2 absorbs the impact force from the road surface via the wheels and the axle, and the damper D1 suppresses the vibration of the spring 2 and controls the vehicle body.

  As shown in FIG. 4, the damper D <b> 1 extends in the axial direction and has a cylindrical cylinder 10 having an enlarged diameter portion 11 attached in the vicinity of the vehicle body side end portion, and is slidably fitted in the cylinder 10. The piston 60, the end on the vehicle body side are connected to the piston 60, the end on the axle side is attached to the outside of the cylinder 10, and the end of the cylinder 10 on the vehicle body side is attached. A vehicle body side attachment member 24 and an axle side attachment member 21 attached to the end of the cylinder 10 on the axle side are provided. The cylinder 10 is filled with hydraulic oil.

  The exterior component G1 includes a spring 2 provided so as to surround the cylinder 10 and the piston rod 20, a spring receiving portion 22 provided on the axle side end portion of the piston rod 20 and supporting the axle side end portion of the spring 2. A spring guide 50 is mounted on the vehicle body side of the spring 2 and has at least one protruding portion 53 protruding radially inward of the cylinder 10, and at least one groove portion 42 notched in the axial direction of the cylinder 10 on the outer periphery thereof. And a cylinder guide 40 attached to the outer periphery of the cylinder 10, and a screw portion 34 on the inner periphery thereof, and a spring guide 50 on the vehicle body side. A spring adjusting portion 30 that adjusts the entire length of the spring 2 with the spring receiving portion 22 by being in contact with the end portion; And a cap 37 for Attach.

  In the cylinder 10, the piston 60 is partitioned into two upper and lower spaces. Here, the space above the piston 60 constitutes a part of the oil chamber 71 in which oil is stored, and the space below the piston 60 is an oil chamber 72 in which oil is stored.

  A lower space in the oil chamber 71 and a portion in which oil is stored become an oil storage portion 711, and an upper space in the oil chamber 71 and a portion in which air is stored becomes an air storage portion 712. The air accommodating portion 712 also functions as a volume compensation chamber that compensates the volume of oil corresponding to the volume of the piston rod 20 when the piston 60 moves to the vehicle body side.

  The piston 60 is a cylindrical member having a plurality of oil passages. On the outer peripheral surface of the piston 60, a ring groove 64 into which a piston ring 63 that seals between the inner peripheral surface of the cylinder 10 is fitted is formed. The piston ring 63 fitted in the ring groove 64 seals the oil flow between the oil chamber 71 and the oil chamber 72.

The piston 60 includes an oil passage 61 and an oil passage 62 that communicate the oil chamber 71 and the oil chamber 72. The piston 60 also includes a check valve 61 a that allows oil to flow from the oil chamber 71 to the oil chamber 72 and prevents oil from flowing from the oil chamber 72 to the oil chamber 71 on the oil passage 61, And a throttle valve 61b for restricting the flow. Further, the piston 60 allows the oil flow from the oil chamber 71 to the oil chamber 72 while allowing the oil flow from the oil chamber 72 to the oil chamber 71 and the throttle valve 62 b for restricting the oil flow on the oil passage 62. And a check valve 62a for blocking the flow.

  As shown in FIG. 2, an annular enlarged diameter portion 11 is formed on the outer periphery of the cylinder 10 on the vehicle body side. The enlarged-diameter portion 11 restricts movement of a cylinder guide 40 (described later) toward the vehicle body side. The annular portion 11a is formed in an annular shape along the outer periphery of the cylinder 10, and extends from the annular portion 11a toward the axle. And a protruding portion 11b that protrudes. The enlarged diameter portion 11 is fixed to the cylinder 10 by welding or the like, for example. However, without being limited to this, the enlarged diameter portion 11 may be formed integrally with the cylinder 10.

  A groove 15a and a groove 15b are formed on the outer periphery of the cylinder 10 on the axle side. The stopper ring 13a is fitted into the groove 15a, and the stopper ring 13b is fitted into the groove 15b to sandwich the annular protector 13. The protector 13 is a protective member that prevents the spring 10 from coming into contact with the cylinder 10 when the spring 2 vibrates in the horizontal direction during traveling.

  In the present embodiment, the damper provided with the protector 13 is used, but a damper not provided with the protector 13 may be used.

  A rod guide (not shown) is fixed to the opening side end portion of the cylinder 10 by a stopper ring (not shown), and an end plate 12 is fitted to cover the rod guide. In addition, an oil seal (not shown) and a dust seal (not shown) are attached to the rod guide as necessary, so that the rod guide is kept liquid-tight.

  An axle side attachment member 21 as an axle attachment member is provided at the end of the piston rod 20 on the axle side. The axle-side mounting member 21 has a mounting hole 21a penetrating in the radial direction, and a bottomed, substantially cylindrical cylindrical body that opens on the vehicle body side is mounted on the mounting hole 21a. The axle-side mounting member 21 has a screw part on the inner periphery of the cylinder, and the screw part of the cylinder is screwed to a screw part formed on the outer periphery of the end of the piston rod 20 on the axle side. , Attached to the piston rod 20.

  On the axle side of the piston rod 20, a disk-shaped member that bulges radially outward, and a spring receiving portion 22 having a notch is attached. The spring receiving portion 22 is a member for supporting the spring, and is formed on the outer periphery of the piston rod 20. Since the spring receiving portion 22 has a notch, the spring receiving portion 22 can be fitted into the piston rod 20 in the radial direction. Thereby, the spring receiving part 22 is attached to the damper D1.

  A vehicle body side mounting member 24 as a vehicle body mounting member is provided on the vehicle body side of the cylinder 10. The vehicle body side mounting member 24 is a bottomed cylindrical tube having a mounting hole 24a penetrating in the radial direction and having the other end opened, and has a threaded portion on the inner periphery of the tube. The body is screwed into a screw portion formed on the outer periphery of the upper end of the cylinder 10 and attached to the end of the cylinder 10 on the vehicle body side. The mounting hole 24a is formed in the upper part of the vehicle body side mounting member 24 as a through hole penetrating in the radial direction.

  As shown in FIGS. 1 to 3, the lower end of the spring 2 is seated on the upper surface of the spring receiving portion 22 and is extended spirally so as to surround the cylinder 10 toward the vehicle body side. The upper end of the spring 2 is seated on a lower surface 52a of a flange portion 52 of a spring guide 50 described later.

  The spring 2 is sandwiched between the upper surface 22a of the spring receiving portion 22 and the lower surface 52a of the flange portion 52 of the spring guide 50, and can be rotated by the upper surface 22a of the spring receiving portion 22 and the lower surface 52a of the flange portion 52 of the spring guide 50. It is supported.

  On the outer periphery of the upper part of the cylinder 10 on the vehicle body side, a cylindrical spring adjustment portion 30 having both axial ends opened is arranged. The spring adjusting portion 30 is a member for adjusting the overall length of the spring 2 with the spring receiving portion 22 by being brought into contact with one end of a spring guide 50 described later. The spring adjustment portion 30 is formed of, for example, resin, and a screw portion 34 is formed in the axial direction at the lower end of the inner periphery thereof. The screw portion 34 protrudes inward in the radial direction and is screwed with a screw portion 43 of a cylinder guide 40 described later. A cap 37 is press-fitted into the vehicle body side opening end of the spring adjustment unit 30.

  In addition, an outer periphery of the spring adjustment unit 30 has an operation unit 31 that can be manually rotated. As shown in FIG. 3, the operation unit 31 has, for example, a plurality of recesses along the outer periphery of the spring adjustment unit 30, and the recesses are extended in the axial direction. Due to the depression in the operation unit 31, the spring adjustment unit 30 can be easily grasped by hand and can be rotated by holding the operation unit 31 of the spring adjustment unit 30 by hand, thereby further adjusting the reaction force of the spring. It becomes easy.

  Further, as shown in FIG. 4, a communication path 33 that is inclined toward the contact surface 32 is formed below the inner wall of the spring adjustment unit 30. The communication path 33 communicates with the outside while inclining from the inside of the spring adjustment unit 30. For this reason, rainwater entering from the gap between the outer periphery of the spring adjusting portion 30 and the cylinder 10 can be easily drained to the outside from the communication path 33. Of course, not only rainwater, but also dust and dirt entering the gap can be easily discharged to the outside through the communication path 33 together with rainwater.

  A cylindrical cylinder guide 40 is fitted into the cylinder 10 below the spring adjustment unit 30. A screw part 43 is formed in the axial direction from the end of the cylinder guide 40 on the vehicle body side to the end of the axle side. As shown in FIG. 4, the screw portion 43 has substantially the same diameter as the screw portion 34 of the spring adjustment portion 30, so that the spring adjustment portion 30 and the cylinder guide 40 are threadably engaged with each other. That is, the spring adjustment unit 30 can be moved up and down in the axial direction.

  The cylinder guide 40 is a cylindrical member that is inserted into the inner periphery of the spring guide 50, and a recess 41 that fits with the protruding portion 11 b of the enlarged diameter portion 11 is formed on the outer periphery of the end portion on the vehicle body side. The recesses 41 are cut out from the end of the cylinder guide 40 on the vehicle body side toward the axle, and are disposed, for example, as a pair in the radial direction. The concave portion 41 is fitted to the protruding portion 11 b of the enlarged diameter portion 11 of the cylinder 10 to attach the cylinder guide 40 to the cylinder 10. For this reason, the recessed part 41 should just be at least 1 according to the number of the protrusion parts 11b.

  Further, at least one groove portion 42 is formed on the outer periphery of the cylinder guide 40 in the axial direction, for example, from an end on the vehicle body side to an end on the axle side. The groove 42 is formed at a predetermined interval from the recess 41 and is fitted with a protrusion 53 of a spring guide 50 described later. Further, the cylinder guide 40 is formed with a screw portion 43 provided in the axial direction on the outer periphery other than the groove portion 42.

  In the present embodiment, since the groove portion 42 is cut out in the axial direction from the vehicle body side end portion of the outer periphery of the cylinder guide 40 to the axle side end portion, the spring guide 50 can be connected to the cylinder guide 40 from either the vehicle body side or the axle side. Can be installed.

  A spring guide 50 that supports the upper end of the spring 2 is fitted into the outer periphery of the cylinder guide 40. That is, the spring guide 50 is attached to the cylinder 10 via the cylinder guide 40. The spring guide 50 has an inner diameter that is larger than the outer diameter of the cylinder guide 40. The spring guide 50 has a cylindrical portion 51 having an outer diameter smaller than the inner diameter of the spring 2, the diameter of the cylindrical portion 51 is increased radially outward from the vehicle body side end portion, and has an outer diameter substantially the same as the outer diameter of the spring 2. And a projecting portion 53 projecting radially inward of the cylinder 10 on the inner periphery of the collar portion. The cylindrical portion 51 is fitted and inserted so as to overlap the cylinder guide 40, the protruding portion 53 is fitted into the groove portion 42 of the cylinder guide 40, and the upper surface 52 b of the flange portion 52 is brought into contact with the abutting surface 32 of the spring adjusting portion 30. Yes. The lower surface 52a of the flange 52 abuts against the end of the spring 2 on the vehicle body side and supports the spring 2 so as to be rotatable. There may be a plurality of projecting portions 53 of the spring guide 50, but in order to be fitted with the groove portions 42 of the cylinder guide 40, the number is the same as the number of the groove portions 42 of the cylinder guide 40 or a number smaller than the number of the groove portions 42. Of course, it is formed.

  By adopting such a configuration, in the inverted hydraulic shock absorber, even when the spring 2 rotates during traveling, the spring 52 adjusts the rotational force of the spring 2 by the flange 52 of the spring guide 50. Never tell. That is, since the spring adjustment unit 30 does not rotate due to the rotation of the spring 2, the initial load set before traveling can be maintained.

  Further, the concave portion 41 of the cylinder guide 40 engages with the protruding portion 11b of the enlarged diameter portion 11, and the screw portion 34 on the inner periphery of the spring adjustment portion 30 and the screw portion 43 of the cylinder guide 40 are screwed together. By simply rotating the spring adjustment part 30 in the circumferential direction, the spring adjustment part 30 is moved in the axial direction, and the total length of the spring 2 interposed between the spring adjustment part 30 and the spring receiving part 22 is simply changed. The reaction force of 2 can be changed. That is, no special tool is required, and the reaction force of the spring 2 is adjusted by changing the overall length of the spring 2 through the spring guide 50 by the rotation of the spring adjustment unit 30 to easily adjust the initial set load of the spring. be able to.

  FIG. 5 is a diagram illustrating a manufacturing procedure of the hydraulic shock absorber 1 according to the first embodiment. Below, with reference to Drawing 5 (a)-Drawing 5 (e), the preparation procedure of hydraulic shock absorber 1 concerning Embodiment 1 is explained in full detail.

  As shown in FIG. 5A, in the damper D1, the axle side mounting member 21 is attached to the damper D1 from the beginning. This is because, for example, a screw portion is formed in the vicinity of the end portion of the piston rod 20 on the axle side, and a screw portion is formed in the axle side mounting member 21 from the vehicle body side toward the axle side, thereby The axle side and the axle side mounting member 21 are integrated by screwing together. However, without being limited thereto, the piston rod 20 and the axle-side attachment member 21 may be attached by welding. The vehicle body side attachment member 24 is also attached to the damper D1 in the same manner as the axle side attachment member 21. Here, detailed mounting procedures of the axle side mounting member 21 and the vehicle body side mounting member 24 are omitted.

  In the damper D1 as described above, the annular portion 11a is fitted on the outer periphery on the axle side of the cylinder 10 in which the piston rod 20 is inserted so that the protruding portion 11b faces the axle side. 10 is fixed.

  Next, as shown in FIG. 5B, the cylinder guide 40 is inserted into the cylinder 10 from the axle side so that the recess 41 faces the vehicle body side, and the protrusion of the enlarged diameter portion 11 fixed to the cylinder 10. The part 11b and the recessed part 41 of the cylinder guide 40 are fitted. Thereby, the cylinder guide 40 is attached to the cylinder 10.

  Next, as shown in FIG. 5C, the spring adjustment portion 30 is fitted into the cylinder 10 from the axle side, and the screw portion 34 of the spring adjustment portion 30 is screwed into the screw portion 43 of the cylinder guide 40. . However, the present invention is not limited to this, and the cylinder guide 40 is fitted and inserted into the cylinder 10 from the axle side in a state where the screw portion 34 of the spring adjusting portion 30 is screwed to the screw portion 43 of the cylinder guide 40. You may fit the protrusion part 11b of the diameter part 11, and the recessed part 41 of the cylinder guide 40. FIG. Thereafter, the cap 37 is press-fitted from the vehicle body side into the opening of the spring adjustment unit 30 on the vehicle body side.

  Next, as shown in FIG. 5D, the spring guide 50 is fitted into the cylinder 10 from the axle side, and the protruding portion 53 of the spring guide 50 is fitted into the groove portion 42 of the cylinder guide 40. At this time, the spring guide 50 is moved to the vehicle body side until the flange portion 52 of the spring guide 50 is brought into contact with the contact surface 32 of the spring adjustment unit 30.

  Next, as shown in FIGS. 5C and 5D, the stopper ring 13 a is inserted into the cylinder 10 from the axle side and is fitted into a groove 15 a formed on the axle side of the outer periphery of the cylinder 10. Next, the annular protector 13 is inserted into the outer periphery of the cylinder 10 from the axle side, and the stopper ring 13b is inserted in the same manner as the stopper ring 13a, and is fitted into the groove 15b. Accordingly, the protector 13 is attached to the cylinder 10 by being sandwiched between the stopper rings 13a and 13b from both sides in the axial direction.

  Next, as shown in FIG. 5 (e), the end of the spring 2 on the vehicle body side is inserted into the cylinder 10 from the axle side so as to contact the lower surface 52 a of the flange 52, and with respect to the piston rod 20. The spring receiver 22 is fitted in the radial direction. Accordingly, the spring 2 is supported by the flange portion 52 of the spring guide 50 and the upper surface 22 a of the spring receiving portion 22.

(Embodiment 2)

  FIG. 6 is a front view of the hydraulic shock absorber 100 according to the second embodiment. FIG. 7 is a diagram illustrating a procedure for creating the hydraulic shock absorber 100 according to the second embodiment.

  With reference to FIG.6 and FIG.7, the other structure which concerns on embodiment of this invention is demonstrated. Since the shape and function of each component of the hydraulic shock absorber 100 according to the second embodiment are the same as those of the component according to the first embodiment described above, details are omitted. The hydraulic shock absorber 101 includes a damper D2 including a cylinder 110, a piston rod 120, and a vehicle body side mounting member 123, a stopper ring 113, a spring receiving portion 121, a spring 102, a spring guide 150, a cylinder guide 140, a spring adjusting portion 130, and an axle side. It is comprised from exterior component G2 which consists of the attachment member 124. FIG.

  As shown in FIGS. 6 and 7, the damper D <b> 2 includes a cylindrical cylinder 110 that extends in the axial direction, a piston (not shown) that is slidably fitted in the cylinder 110, and an end on the vehicle body side. Is connected to the piston, and the end of the axle is extended to the outside of the cylinder 110, the body-side mounting member 123 attached to the end of the cylinder 110 on the body, and the piston rod 120 And a hexagonal nut 127 attached in the vicinity of the end on the axle side. The cylinder 110 is filled with hydraulic oil. In addition, although the detailed structure of the piston of the hydraulic shock absorber 100 according to the second embodiment is not illustrated, for example, it has the same structure as the piston 60 of the hydraulic shock absorber 1 according to the first embodiment shown in FIG. Well, I will omit it here.

  The exterior component G2 includes a spring 102 provided so as to surround the cylinder 110 and the piston rod 120, a spring receiving portion 121 provided on the outer periphery of the cylinder 110 in the vicinity of the vehicle body side and supporting the vehicle body side end portion of the spring 102, A spring guide 150 having at least one protrusion 153 that is attached to the axle side of the spring 102 and protrudes radially inward of the cylinder 110, and at least one groove 142 that is notched in the axial direction of the cylinder 110 on the outer periphery thereof. A cylinder guide 140 having an axially provided screw portion 143 on the outer periphery other than the groove portion 142, a cylinder guide 140 attached to the outer periphery of the cylinder 110, a screw portion 134 on the inner periphery thereof, and an axle end of the spring guide 150 The total length of the spring 102 is adjusted with the spring receiving portion 121 by being in contact with the portion. It comprises the value adjustment unit 130, a stopper ring 113 attached to the end portion of the vehicle body of the cylinder 110, and an axle side mounting portion 124 attached to the axle side end of the cylinder 110.

  As shown in FIG. 7, a groove 115 is formed in the circumferential direction on the outer periphery of the cylinder 110 below the vehicle body side mounting member 123. An annular stopper ring 113 is fitted into the groove 115 and is fixed to the cylinder 110. The stopper ring 113 fixed to the cylinder 110 bulges radially outward from the outer periphery of the cylinder 110.

  The spring receiving part 121 is formed with a stopper ring receiving part 121a protruding in the radial direction on the inner periphery thereof. The spring receiving portion 121 is fitted into the cylinder 110 from the axle side, and the stopper ring receiving portion 121a of the spring receiving portion 121 abuts against the stopper ring 113, so that the movement toward the vehicle body side is stopped.

  The spring receiving portion 121 is a member that supports the end of the spring 102 on the vehicle body side. The spring 102 is fitted and inserted from the axle side end of the cylinder 110, and the vehicle body side end of the spring 102 is seated on the lower surface 121 b of the spring receiving portion 121. For this reason, the movement of the spring receiving portion 121 in the axial direction is restricted by the stopper ring 113 and the spring 102.

  A spring guide 150 fitted into the cylinder 110 via the cylinder guide 140 has a cylindrical portion 151 having an inner diameter larger than the outer diameter of a cylinder guide 140 described later and an outer diameter smaller than the inner diameter of the spring 102, and a cylinder. A flange 152 having a diameter that is radially outward from the end on the axle side of the portion 151 and having an outer diameter that is substantially the same as the outer diameter of the spring 102; Projecting portion 153. The spring guide 150 is fitted into the cylinder 110 with the cylindrical portion 151 facing the vehicle body side, and the upper surface 152a of the flange portion 152 abuts on the end portion on the axle side of the spring 102. That is, the spring 102 is sandwiched between the lower surface 121 b of the spring receiving portion 121 and the upper surface 152 a of the flange portion 152.

  The cylinder guide 140 is a cylindrical member that is inserted into the inner periphery of the spring guide 150. A screw portion 143 is formed on the outer periphery of the cylinder guide 140 in the axial direction, and is fitted to a protruding portion 124d of an axle-side mounting member 124 described later. A recess 141 is formed. The concave portions 141 are cut out from the end of the cylinder guide 140 on the axle side toward the vehicle body, and are disposed, for example, as a pair in the radial direction. The recess 141 is for fitting a cylinder guide 140 to the cylinder 110 by being fitted to a protruding portion 124d at the vehicle body side end of an axle side mounting member 124 described later. For this reason, the recessed part 141 should just be at least 1 according to the number of the protrusion parts 124d.

  In addition, a groove 142 is formed in the outer periphery of the cylinder guide 140 by being notched in the screw portion 143 in the axial direction. The groove 142 is formed at a predetermined interval from the recess 141 and is fitted to the protrusion 153 of the spring guide 150. That is, the cylinder guide 140 is formed with a screw portion 143 provided in the axial direction on the outer periphery other than the groove portion 142. The cylinder guide 140 is fitted and inserted from the axle side of the cylinder 110 while fitting the groove 142 to the protruding portion 153 of the spring guide 150.

  In the present embodiment, the groove 142 is cut out in the axial direction from the vehicle body side end to the axle side end of the outer periphery of the cylinder guide 140, so that the spring guide 150 is connected to the cylinder guide 140 from either the vehicle body side or the axle side. Can be installed.

  On the outer periphery of the end of the cylinder 110 on the axle side, a cylindrical spring adjustment portion 130 having both ends opened in the axial direction is provided. The spring adjusting unit 130 is a member for adjusting the entire length of the spring 102 with the spring receiving unit 121 by being brought into contact with the other end of a spring guide 150 described later. The spring adjustment portion 130 is formed of, for example, resin, and a screw portion 134 is formed in the axial direction in the vicinity of the vehicle body side end portion of the inner periphery. With this screw part 134, the spring adjustment part 130 is screwed into a screw part 143 of a cylinder guide 140 described later. The contact surface 132 of the spring adjustment unit 130 contacts the lower surface 152b of the flange 152.

  Further, on the outer periphery of the spring adjustment unit 130, there is an operation unit 131 that can be manually rotated. As shown in FIG. 7, for example, the operation unit 131 has a plurality of recesses along the outer periphery of the spring adjustment unit 130, and the recesses are extended in the axial direction. Due to the depression in the operation unit 131, the spring adjustment unit 130 can be easily grasped by hand, and can be rotated by holding the operation unit 131 of the spring adjustment unit 130 by hand, thereby further adjusting the reaction force of the spring. It becomes easy.

  Further, the spring adjustment unit 130 may be formed with a communication path (not shown) in which the inner periphery and the outer periphery communicate with each other from the vehicle body side toward the axle side. Since the inner and outer peripheries of the spring adjustment unit 130 communicate with each other in the communication path, the rainwater collected in the spring adjustment unit 130 is discharged, and dust and dirt collected inside the spring adjustment unit 130 together with the rainwater. Can also be discharged to the outside. The drainage path for rainwater, dust, etc. is not limited to the communication path, and it is a matter of course that rainwater, dust, etc. may be drained from the gap between the cylinder 110 and the spring adjustment unit 130.

  The axle side attachment member 124 has an attachment hole 124a and is attached by screwing a screw hole 124c formed in the upper surface 124b to a screw part 120a formed on the outer periphery of the end of the piston rod 120 on the axle side. The mounting hole 124 a is formed on the lower end side of the axle side mounting member 124 as a through hole that penetrates in the radial direction of the cylinder 110. The upper surface 124b is formed with a protruding portion 124d that extends in the radial direction and protrudes toward the vehicle body. The protruding portion 124d is a member that fits into the concave portion 141 of the cylinder guide 140 and restricts rotation of the cylinder guide 140 in the circumferential direction. The screw hole 124c is a hole that penetrates the center of the protruding portion 124d. The axle-side mounting member 124 also functions as a cap that seals the axle-side opening of the spring adjustment portion 130. The axle side attachment member 124 is fixed in contact with a hexagon nut 127 described later that is screwed into the screwing portion 120a of the piston rod 120.

  In the hydraulic shock absorber 100 according to the second embodiment, the protector that prevents the spring 102 from colliding with the cylinder 110 and prevents the cylinder 110 from being damaged is not used, but it is needless to say that the protector may be attached. .

  By adopting such a configuration, the rotational force of the spring 102 is not transmitted to the spring adjustment unit 130 by the flange 152 of the spring guide 150 even when the spring 102 rotates during traveling. That is, since the spring adjustment unit 130 is not rotated by the rotation of the spring 102, the initial load set before traveling can be maintained.

  Further, since the inner thread portion 134 of the spring adjustment portion 130 and the screw portion 143 of the cylinder guide 140 are screwed together, the spring adjustment portion 130 can be moved in the axial direction simply by rotating the spring adjustment portion 130 in the circumferential direction. The total force of the spring 102 interposed between the spring adjusting unit 130 and the spring receiving unit 121 can be easily changed, and the reaction force of the spring 102 can be changed. That is, a special tool is not required, and the reaction force of the spring 102 is adjusted by changing the overall length of the spring 102 via the spring guide 150 by the rotation of the spring adjustment unit 130, thereby easily adjusting the initial set load of the spring 102. can do.

  Below, with reference to FIG. 7, the preparation procedure of the hydraulic shock absorber 101 which concerns on this embodiment is explained in full detail. As shown in FIG. 7A, in the damper D2, a piston rod 120 provided with a piston (not shown) at the end on the vehicle body side is inserted into the cylinder 110, and the vehicle body side mounting member 123 is connected to the cylinder 110. Attach to the end of the car body. Here, the cylinder 110 and the vehicle body side mounting member 123 may be attached by screwing or welding.

  Next, the hex nut 127 is screwed into the screw part 120 a of the piston rod 120.

  Next, the stopper ring 113 is inserted from either the vehicle body side or the axle side of the cylinder 110, and is inserted into the groove 115 and fixed.

  Next, the spring receiving part 121 is fitted and inserted from the vehicle body side or axle side of the cylinder 110, and the spring receiving part 121 is moved to the vehicle body side until the stopper ring receiving part 121a of the spring receiving part 121 hits the stopper ring 113.

  Next, the spring 102 is fitted into the cylinder from the axle side, one end of the spring 102 on the vehicle body side is seated on the spring receiving portion 121, and the spring guide 150 is placed on the axle side so that the cylindrical portion 151 of the spring guide 150 faces the vehicle body side. The flange portion 152 of the spring guide 150 is brought into contact with the end portion of the spring 102 on the axle side.

  Next, while the groove 142 of the cylinder guide 140 is fitted to the protrusion 153 of the spring guide 150, the cylinder guide 140 is fitted into the cylinder 110 from the axle side and moved to the vehicle body side, and is moved toward the inner periphery of the spring guide 150. A cylinder guide 140 is attached.

  Next, while screwing the screw portion 134 of the spring adjustment portion 130 to the screw portion 134 of the cylinder guide 140, the vehicle body side until the lower surface 152 b of the flange portion 152 of the spring guide 150 contacts the contact surface 132 of the spring adjustment portion 130. Move to. At this time, the cylinder guide 140 may be attached to the spring guide 150 while the screw portion 143 of the spring adjustment unit 130 is screwed to the screw portion 143 of the cylinder guide 140.

  Here, the hexagon nut 127 is already attached to the piston rod 120, but the hexagon nut 127 may be screwed into the screw portion 120a of the piston rod 120 at this stage.

  Next, the spring 102 or the spring adjustment portion 130 is moved to the vehicle body side, the spring 102 is contracted to the vehicle body side, and the axle side mounting member 124 is screwed into the screw portion 120a at the axle side end portion of the piston rod 120. The piston rod 120 and the axle-side mounting member 124 are fixed by rotating and tightening the hexagon nut 127 toward the axle.

  Next, while the axle side mounting member 124 fixed to the piston rod 120 is rotated in the circumferential direction, the concave portion 141 of the cylinder guide 140 attached to the cylinder 110 and the protruding portion 124d of the axle side mounting member 124 are fitted. Let

  Finally, the spring 102 or the spring adjustment unit 130 is moved to the axle side, and the contracted spring 102 is moved to the axle side, thereby producing the hydraulic shock absorber 100 shown in FIG. 7B.

  As mentioned above, although the Example of this invention was explained in full detail with drawing, the concrete structure of this invention is not restricted to this embodiment, Even if there is a design change etc. in the range which does not deviate from the summary of this invention. It is included in the present invention. For example, you may comprise as shown below.

  The groove portion 42 of the cylinder guide 40 and the groove portion 142 of the cylinder guide 140 are notched in the axial direction from the vehicle body side end portion to the axle side end portion, but are cut at a predetermined length in the axial direction from the vehicle body side end portion. It may be omitted. With this configuration, the groove portion 42 of the cylinder guide 40 and the groove portion 142 of the cylinder guide 140 are notched in a predetermined length in the axial direction from the end portion on the vehicle body side. The cylinder guide 40 or the cylinder guide 140 and the spring guide 50 or the spring guide 150 can be attached by fitting the spring guide 50 or the spring guide 150 from the end. For example, when the groove portion 42 of the cylinder guide 40 or the groove portion 142 of the cylinder guide 140 has a predetermined length that does not reach the end portion on the axle side in the axial direction from the end portion on the vehicle body side, The movement can be stopped after moving the spring guide 50 or the spring guide 150 by a predetermined length. For this reason, as with the spring guide 50 or the spring guide 150, the spring adjustment unit 30 or the spring adjustment unit 130 can be restrained from moving to the axle side by a predetermined length. As a result, it is possible to prevent the spring adjustment unit 30 and the spring adjustment unit 130 from dropping off to the axle side.

  The groove portion 42 of the cylinder guide 40 and the groove portion 142 of the cylinder guide 140 are notched in the axial direction from the vehicle body side end portion to the axle side end portion, but are cut at a predetermined length in the axial direction from the axle side end portion. It may be omitted. With this configuration, the groove portion 42 of the cylinder guide 40 and the groove portion 142 of the cylinder guide 140 are notched in a predetermined length in the axial direction from the end portion on the axle side. The cylinder guide 40 or the cylinder guide 140 and the spring guide 50 or the spring guide 150 can be attached by fitting the spring guide 50 or the spring guide 150 from the end. For example, when the groove 42 of the cylinder guide 40 or the groove 142 of the cylinder guide 140 has a predetermined length that does not reach the end on the vehicle body side in the axial direction from the end on the axle side, The movement can be stopped after moving the spring guide 50 or the spring guide 150 by a predetermined length. For this reason, as with the spring guide 50 or the spring guide 150, the movement of the spring adjustment unit 30 or the spring adjustment unit 130 to the vehicle body side can be stopped by a predetermined length. As a result, it is possible to prevent the spring adjustment unit 30 and the spring adjustment unit 130 from dropping out to the vehicle body side.

  The groove portion 42 and the cylinder guide 140 groove portion 142 of the cylinder guide 40 described above are notched in the axial direction from the vehicle body side end portion to the axle side end portion, but the groove portion 42 of the cylinder guide 40 and the groove portion 142 of the cylinder guide 140 are Further, a predetermined length may be cut out between an end portion on the axle side on the outer periphery and an end portion on the vehicle body side. According to this, the groove portion 42 of the cylinder guide 40 and the groove portion 142 of the cylinder guide 140 are notched at a predetermined length between the end portion on the axle side and the end portion on the vehicle body side in the outer periphery. The spring guide 50 or the spring guide 150 can be stopped after moving a predetermined length both on the vehicle body side and on the axle side. For this reason, as with the spring guide 50 or the spring guide 150, the spring adjustment unit 30 or the spring adjustment unit 130 can be restrained from moving to the vehicle body side and the axle side by a predetermined length. As a result, it is possible to prevent the spring adjustment unit 30 and the spring adjustment unit 130 from falling off to the vehicle body side and the axle side.

  The spring guide 50 and the spring guide 150 described above are formed using a metal member, but may be formed of an elastic resin. For example, phenol resin (PF), melamine resin (MF), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), or the like may be used.

  For example, in the circular cylinder guides 40 and 140 in the cross-sectional view and the spring guides 50 and 150 in the elliptical shape in the cross-sectional view, the diameters of the cylinder guides 40 and 140 and the short diameter of the spring guides 50 and 150 are the same. , 150 is a resin that can be deformed in the radial direction, the spring guides 50, 150 can be widened at one end in the radial direction so that the length of the short axis is longer than the diameter of the cylinder guides 40, 140. . At this time, by aligning the positions of the protrusions 53 and 153 of the spring guide with the positions of the grooves 42 and 142 of the cylinder guides 40 and 140 and releasing the expanded force, the spring guides are inserted into the grooves 42 and 143 of the cylinder guides 40 and 140. The protrusions 53 and 153 can be fitted. Therefore, for example, even when the groove portions 42 and 142 of the cylinder guides 40 and 140 are provided between the vehicle body side end portion and the axle side end portion of the cylinder guides 40 and 140, the protruding portion of the spring guide 50 is provided. The spring guides 50 and 150 can be attached to the cylinder guides 40 and 140 by fitting 53 into the groove 42 of the cylinder guide 40 and fitting the protrusion 153 of the spring guide 150 into the groove 142 of the cylinder guide 140. Further, even if either one of the end portions of the spring guides 50 and 150 on the vehicle body side or the axle side is not open, the protruding portions 53 and 153 of the spring guides 50 and 150 and the cylinder guide 40 are similarly provided. , 140 can be fitted to the groove portions 42 and 142, and the spring guides 50 and 150 can be attached to the cylinder guides 40 and 140.

  FIG. 8A is a front view when a dust cover is attached to the hydraulic shock absorber 1 according to the first embodiment, and FIG. 8B is a case where a dust cover is attached to the hydraulic shock absorber 100 according to the second embodiment. FIG.

  As another configuration of the hydraulic shock absorber 1, as shown in FIG. 8A, the flange portion 52 of the spring guide 50 is expanded radially outside the outer diameter of the spring 2, and the spring receiving portion 22 is The annular dust cover 80 is sandwiched between the outer diameters of the 52 and the annular dust cover 80. The dust cover 80 is a telescopic bellows-like member, and its inner diameter is set larger than the outer diameter of the spring 2 and both ends are open. Thereby, it can mount | wear with the hydraulic shock absorber 1 so that the whole spring 2 may be coat | covered. Accordingly, since the dust cover 80 is provided on the outer periphery of the spring 2, dust and dirt do not adhere to the piston rod 20, the spring 2, and the like, and the functions of the piston rod 20, the spring 2, and the like can be maintained.

  Further, as another configuration of the hydraulic shock absorber 100, as shown in FIG. 8B, the flange portion 152 of the spring guide 150 is expanded in the radial direction outside the outer diameter of the spring 102, and the spring receiving portion 121 is provided. The outer diameter of the flange 152 is increased to be equal to the outer diameter, and the annular dust cover 180 is sandwiched. The dust cover 180 is a telescopic bellows-like member, and its inner diameter is set larger than the outer diameter of the spring 102 and both ends are open. As a result, the hydraulic shock absorber 100 can be mounted so as to cover the entire spring 102. Accordingly, since the dust cover 180 is provided on the outer periphery of the spring 102, dust and dirt do not adhere to the piston rod 120, the spring 102, etc., and the functions of the piston rod 120, the spring 102, etc. can be maintained.

  In both cases of Embodiments 1 and 2, in FIGS. 1 and 6, respectively, the vehicle body side is one end side shown in the claims, and the axle side is the other end side shown in the claims. As explained.

  However, it is not limited to this. That is, in the first embodiment, a so-called inverted hydraulic shock absorber is mounted, and the spring adjustment portion 30 side is the vehicle body side and the spring receiving portion 22 is the axle side. The same effect can be obtained by setting the portion 30 side to the axle side and the spring receiving portion 22 to the vehicle body side.

  In the second embodiment, the so-called inverted hydraulic shock absorber is mounted, and the spring adjustment portion 130 side is the axle side and the spring receiving portion 121 is the vehicle body side. The same effect can be obtained when the portion 130 side is the vehicle body side and the spring receiving portion 121 is the axle side.

  Moreover, although the hydraulic shock absorber 1 and the hydraulic shock absorber 101 shown in the present embodiment have been described as rear shocks for two-wheeled vehicles, the seat damper is not limited to two-wheeled vehicles and may be used as hydraulic shock absorbers for automobiles and bicycles. Of course, it may be used.

DESCRIPTION OF SYMBOLS 1, 100 Hydraulic shock absorber 2, 102 Spring 10, 110 Cylinder 11 Expanded diameter part 11b Projection part 20, 120 Piston rod 21, 124 Axle side attachment member 22, 121 Spring receiving part
24, 123 Car body side attachment member 30, 130 Spring adjustment part 32, 132 Abutment surface 40, 140 Cylinder guide 41, 141 Recess 42, 142 Groove part 50, 150 Spring guide 52, 152 Ling part 53, 153 Projection part

Claims (10)

An axially extending cylinder;
A piston slidably fitted in the cylinder;
A piston rod having one end connected to the piston and the other end extending outside the cylinder;
A spring provided to surround the cylinder and the piston rod;
A spring receiving portion provided at the other end of the piston rod and supporting the other end of the spring;
Together is attached to one end of the spring, extending from the end portion of the vehicle body side to an end portion of the axle side, is opposed to the pair in the radial direction and a collision detecting portion which diameter is projected in the inward of the cylinder spring guide When,
Cut out from the end portion of the vehicle body on its outer periphery in the axial direction to the end portion of the axle side, it is opposed to a pair radially axially to the outer periphery of the non-groove portion and a groove portion for篏合with the protrusion And a cylinder guide attached to the outer periphery of the cylinder,
A spring adjusting portion having a screw portion on the inner periphery and a plurality of depressions along the outer periphery, and adjusting the overall length of the spring with the spring receiving portion by being in contact with one end of the spring guide And
By fitting the protruding portion of the spring guide and the groove portion of the cylinder guide, the spring guide is attached to the cylinder via the cylinder guide,
The hydraulic shock absorber according to claim 1, wherein the spring adjustment portion is movable in an axial direction by screwing the screw portion of the cylinder guide and the screw portion of the spring adjustment portion. An axially extending cylinder;
A piston slidably fitted in the cylinder;
A piston rod having one end connected to the piston and the other end extending outside the cylinder;
A spring provided to surround the cylinder and the piston rod;
A spring receiving portion provided on the outer periphery in the vicinity of one end of the cylinder and supporting one end of the spring;
At least one projecting portion that is attached to the other end side of the spring, extends from the end portion on the vehicle body side to the end portion on the axle side, and is opposed to the pair in the radial direction, and projects inward in the radial direction of the cylinder A spring guide having
The outer periphery thereof is cut out in the axial direction of the cylinder from the end portion on the vehicle body side to the end portion on the axle side, and is disposed in a pair in the radial direction so as to be opposed to each other and on the outer periphery other than the groove portion. A cylinder guide having a screw portion provided in the axial direction and attached to the outer periphery of the cylinder;
A spring adjustment that has a screw portion on its inner periphery and a plurality of recesses along the outer periphery, and adjusts the overall length of the spring with the spring receiving portion by being in contact with the other end of the spring guide With
By fitting the protruding portion of the spring guide and the groove portion of the cylinder guide, the spring guide is attached to the piston rod side via the cylinder guide,
The hydraulic shock absorber according to claim 1, wherein the spring adjustment portion is movable in an axial direction by screwing the screw portion of the cylinder guide and the screw portion of the spring adjustment portion.   3. The hydraulic shock absorber according to claim 1, wherein the groove portion of the cylinder guide is cut out in an axial direction from an end portion on a vehicle body side to an end portion on an axle side.   3. The hydraulic shock absorber according to claim 1, wherein the groove portion of the cylinder guide is cut out at a predetermined length in an axial direction from an end portion on a vehicle body side.   3. The hydraulic shock absorber according to claim 1, wherein the groove portion of the cylinder guide is cut out at a predetermined length in an axial direction from an end portion on an axle side.   3. The hydraulic pressure according to claim 1, wherein the groove portion of the cylinder guide is cut out at a predetermined length between an end portion on an axle side and an end portion on a vehicle body side on an outer periphery thereof. Shock absorber.   The hydraulic shock absorber according to any one of claims 1 to 6, wherein the spring guide is formed of a material that is deformable in a radial direction of the cylinder.   The hydraulic shock absorber according to any one of claims 1 to 7, wherein the spring adjustment portion includes a communication path in which an inner periphery and an outer periphery communicate with each other.   The hydraulic shock absorber according to any one of claims 1 to 8, wherein the spring adjustment portion has an operation portion that can be operated by hand on an outer periphery thereof.   The hydraulic shock absorber according to any one of claims 1 to 9, wherein a dust cover is provided on an outer periphery of the spring.

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